Blue Hydraulic System Low Pressure/Overheat Caused by User System Fault

TASK 29-12-00-810-823-A
Blue Hydraulic System Low Pressure/Overheat Caused by User System Fault

1. Possible Causes

user system component internal leak

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 29-12-00-810-802-A	Overheat Indication of the Blue Hydraulic System
TSM TASK 29-12-00-810-805-A	Loss of the System Pressure of the Blue Hydraulic System

3. Fault Confirmation
Subtask 29-12-00-700-052-A

A. Test
(1) If there are overheat and or low pressure indications:
(a) Do the Fault Isolation.

NOTE: A low pressure or overheat indication can be caused by a user system component internal leak .

4. Fault Isolation
Subtask 29-12-00-810-085-A

A. Procedure
(1) Make sure that all the user systems of the Blue HYD system that follow have no defects:

LH and RH Ailerons
LH and RH Spoilers 3
LH and RH Elevators
LH and RH Slats Wing Tip Brake
LH and RH Flaps Wing Tip Brake
Rudder
Slats
Constant Speed Motor/Generator.

(2) If all the user systems are serviceable:
(a) Do the procedures for the Blue HYD system Low Pressure and Overheat, (Ref. TSM TASK 29-12-00-810-805) and (Ref. TSM TASK 29-12-00-810-802).
(3) If the aircraft is on a remote site and the necessary metering equipment is not available, do the procedures as far as possible:
(a) Examine the user system components for an unusual increase in noise and temperature.
(b) Replace a system component that shows an unusual increase in noise and or temperature.
(4) Do the applicable test in Para. 3. A. of (Ref. TSM TASK 29-12-00-810-802) and (Ref. TSM TASK 29-12-00-810-805).

5. Close-up
Subtask 29-12-00-942-050-A

A. Put the aircraft back to the serviceable condition.

[Rev.8 from Aug 2018] 2026.04.04 04:29:24 UTC